@leocg None of these was necessary, especially something as traumatic as resetting my profile, thus loosing 30+ tabs in six seperate folders. The problem finally resolved itself on both Windows and Linux.
With all due repect, next someone asks for help with a simimar problem, perhaps 'resetting the profile' or 'starting with a clean install' are some of the last things you recommed as troublethooting steps?
Thank you for your time and effort!